Integrated device for producing hydrogen peroxide by anthraquinone method
By adopting a coil structure in the cylindrical shell in the hydrogen peroxide production device, the hydrogenation, oxidation and extraction processes are connected in series, and the problems of uneven airflow distribution and complex equipment are solved, the mass transfer efficiency and reaction stability are improved, and the production cost is reduced.
Patent Information
- Application Number
- CN202510572038.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-06
- Publication Date
- 2025-08-08
AI Technical Summary
The existing hydrogen peroxide production equipment has problems such as uneven airflow distribution, insufficient gas-liquid contact, poor mass transfer effect, low gas utilization efficiency, complex equipment and large area, resulting in unstable operation and high production costs.
The coil structure in the cylindrical shell is adopted, including the hydrogenated filler section, the cavity section, the catalytic section and the spoiler section. Through the synergistic action of hydrogen, air and water, the hydrogenation, oxidation and extraction process are achieved, and the gas-liquid mass transfer efficiency is improved by the internal domain limiting effect of the coil, and the oil-water separation is achieved through the filler layer.
It improves the reaction rate and mass transfer efficiency, reduces equipment investment and land occupation, ensures the uniformity and stability of the reaction, improves the quality of hydrogen peroxide products, and reduces operating costs.
Smart Images
Figure CN120437901A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of hydrogen peroxide production devices, in particular to an integrated device for producing hydrogen peroxide using an anthraquinone method. Background Art
[0002] Currently, the industrial production of hydrogen peroxide primarily utilizes the anthraquinone method, which uses anthraquinone as a cyclic hydrogenation carrier and produces hydrogen peroxide through a series of processes, including hydrogenation, oxidation, extraction, purification, and post-treatment. Hydrogen peroxide production involves using 2-ethylanthraquinone as a solute and a mixed solvent consisting of heavy aromatic hydrocarbons, trioctyl phosphate, and tetrabutyl urea. This working solution, along with hydrogen, enters a hydrogenation tower equipped with a palladium catalyst for a hydrogenation reaction. The hydrogen peroxide is then produced by an oxidation tower, where oxygen is added for an oxidation reaction. The hydrogen peroxide product is then extracted with deionized water in an extraction tower, and the working solution continues to circulate within the system.
[0003] Early hydrogen peroxide production relied primarily on the nickel-catalyzed stirred-tank anthraquinone hydrogenation process. As production capacity expanded, the palladium-catalyzed fixed-bed process gradually demonstrated its superiority over the stirred-tank process. Its advantages include simple hydrogenation equipment, high production capacity, the elimination of the need for frequent catalyst additions, excellent safety, and ease of operation. This process has become the leading edge of hydrogen peroxide production. While the palladium-catalyzed fixed-bed process is simple to operate and requires no catalyst separation, it also has significant drawbacks, including uneven reaction conditions, the potential for short-circuiting and localized hot spots, working fluid degradation, catalyst shattering and agglomeration, low catalyst utilization, and a reaction rate affected by hydrogen diffusion.
[0004] Although the fluidized bed process can greatly improve the production efficiency of the device, reduce production costs, make the anthraquinone hydrogenation reaction uniform, avoid the formation of local hot spots during the reaction process that lead to degradation of the working fluid, and is beneficial to improving the quality of hydrogen peroxide products, the fluidized bed process still has problems such as long production process and complex control.
[0005] The current hydrogenation and oxidation processes both have the following shortcomings: uneven airflow distribution, insufficient gas-liquid contact, poor mass transfer, low gas utilization efficiency; incomplete reaction and other issues increase the burden on subsequent processes and lead to unstable operation;
[0006] Hydrogen peroxide extraction is carried out in a sieve plate tower, where pure water and the oxidizing solution undergo countercurrent extraction and separation. This extraction method has the following drawbacks: insufficient mixing of the two phases, the requirement for large amounts of pure water, and the low concentration of separated hydrogen peroxide, which affects equipment production capacity. Furthermore, existing anthraquinone-based hydrogen peroxide production equipment also suffers from numerous equipment components, complex structures, large size, large floor space, and high equipment investment. Summary of the Invention
[0007] In order to solve the technical problems mentioned in the above background technology, the present invention provides an integrated device for producing hydrogen peroxide using an anthraquinone method, and the technical solution adopted is as follows:
[0008] It includes a cylindrical shell, in which a coil, a baffle and a packing layer are arranged from top to bottom. The coil passes through the baffle, the bottom end of the coil passes through the packing layer, and the top end of the coil passes through the cylindrical shell. The coil includes a hydrogenation packing section, a cavity section, a catalytic section and a turbulent section from top to bottom. The right part of the cylindrical shell is provided with a water outlet, a water inlet, an oil drain and an L-shaped drain pipe from top to bottom. The water outlet height of the L-shaped drain pipe is slightly lower than the height of the packing layer.
[0009] Preferably, the hydrogenation packing section is provided with a hydrogen feed port penetrating the cylindrical shell.
[0010] Preferably, a hydrogenation packing is provided in the hydrogenation packing section.
[0011] Preferably, a nitrogen inlet penetrating the cylindrical shell is provided on the cavity section.
[0012] Preferably, a first drain pipe is provided at the front end of the coil.
[0013] Preferably, a short and thick interface is provided between the hydrogenation packing section and the cavity section, an interception net is provided in the short and thick interface, and a second drain pipe is provided on the thick end interface.
[0014] Preferably, the catalytic section is provided with an air inlet penetrating the cylindrical shell, and a catalyst is provided in the catalytic section.
[0015] Preferably, a water injection pipe penetrating the cylindrical shell is provided on the flow-disturbing section, and a flow-disturbing spring is provided in the flow-disturbing section.
[0016] The present invention has the following advantages:
[0017] 1. Through the effect of confinement inside the coil, not only does the reaction system achieve extremely high gas-liquid mass transfer effect, but it also extends the mass transfer path, greatly improving the mass transfer efficiency between the gas, solid and liquid phases on the catalyst surface and increasing the reaction rate.
[0018] 2. The hydrogenation, oxidation and extraction processes are connected in series in the same device through coils, which not only saves equipment investment, but also saves production space, makes the process easier to control, and greatly reduces operating costs.
[0019] 3. Since the hydrogenation, oxidation and extraction processes are connected in series in the same device, the temperature in the reaction system is guaranteed to be equal everywhere, and the reaction can proceed smoothly and quickly.
[0020] 4. Hydrogen can be fully utilized in the coil, which not only saves hydrogen, but also makes the anthraquinone hydrogenation reaction uniform, avoids local overheating during the reaction process and causes decomposition of the working fluid, and improves the quality of hydrogen peroxide products.
[0021] 5. The hydrogenation and oxidation processes in the coil can easily exchange heat with the heat exchange medium in the cylindrical shell, ensuring the thermal stability of the reaction, avoiding degradation of the working fluid, reducing the amount of degradation products, and alleviating the burden on working fluid recovery.
[0022] 6. The working fluid and water are fully mixed in the coil, and are intercepted by hydrophobic particles at the bottom of the cylindrical shell and the water is filtered upward, making the extraction process faster and more thorough. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 It is a structural diagram of the present invention.
[0024] Figures: 1 cylindrical shell, 11 water inlet, 12 water outlet, 2 coil, 21 first drain pipe, 22 hydrogenation packing section, 23 cavity section, 24 short and thick interface, 241 interception net, 25 second drain pipe, 26 catalytic section, 27 spoiler section, 28 spoiler spring, 3 water baffle, 31 hydrogen feed port, 32 nitrogen inlet, 33 air inlet, 34 water injection pipe, 4 packing layer, 5 L-type drain pipe, 6 oil drain port. DETAILED DESCRIPTION
[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0026] Please refer to Figure 1The present invention provides an integrated device for producing hydrogen peroxide using an anthraquinone method, comprising a cylindrical shell 1. A coil 2, a water barrier 3 and a packing layer 4 are arranged inside the cylindrical shell 1 from top to bottom. The water barrier 3 blocks the heated water above the water barrier 3. The packing layer 4 is filled with small hydrophobic particles. The oil between the particles forms an oil film, which makes it difficult for hydrogen peroxide to pass through. When more and more hydrogen peroxide is present below the packing layer 4, the water level rises, pushing the oil layer in the cavity below to rise. After filtering by the packing layer 4, the hydrogen peroxide is retained below and discharged from the L-shaped drain pipe 5. The oil layer is also continuously discharged from the oil discharge port 6 above. The coil 2 passes through the water barrier 3, and a seal is formed between the coil 2 and the water barrier 3. The bottom end of the coil 2 passes through the packing layer 4, and a seal is formed between the coil 2 and the packing layer 4. The top end of the coil 2 passes through the cylindrical shell 1, and the working fluid enters the coil 2 from the top end of the coil 2. The coil 2 includes a hydrogenation packing section 22, a cavity section 23, a catalytic section 26 and a turbulent section 27 from top to bottom. Hydrogen enters the hydrogenation packing section 22 and reacts with the working fluid. The right part of the cylindrical shell 1 is provided with a water outlet 12, a water inlet 11, an oil drain port 6 and an L-shaped drain pipe 5 from top to bottom. The water outlet height of the L-shaped drain pipe 5 is slightly lower than the height of the packing layer 4. Hot water with a temperature of 40 to 55°C is introduced into the water inlet 11 to provide heating conditions for the working fluid reaction inside the coil 2, and the hot water then comes out through the water outlet 12.
[0027] The hydrogenation packing section 22 is provided with a hydrogen feed port 31 penetrating the cylindrical shell 1 . Hydrogen enters the hydrogenation packing section 22 through the hydrogen feed port 31 and reacts with the working fluid in the hydrogenation packing section 22 .
[0028] The hydrogenation packing section 22 is provided with a hydrogenation packing, which acts as a catalyst to accelerate the reaction.
[0029] The cavity section 23 is provided with a nitrogen inlet 32 penetrating the cylindrical shell 1 , and nitrogen enters the cavity section 23 through the nitrogen inlet 32 .
[0030] A first exhaust pipe 21 is provided at the front end of the coil 2. When the working fluid enters the front end of the coil 2, the air carried by the working fluid is exhausted to avoid affecting the subsequent hydrogenation reaction.
[0031] A short and thick interface 24 is provided between the hydrogenation packing section 22 and the cavity section 23. An interception net 241 is provided inside the short and thick interface 24. A second exhaust pipe 25 is provided on the thick end interface 24. After the nitrogen enters the cavity section 23, it blows away the excess hydrogen in the hydrogenation packing section 22 and enters the short and thick interface 24. The impurities in the gas are intercepted by the interception net 241 and then discharged through the second exhaust pipe 25.
[0032] The catalytic section 26 is provided with an air inlet 33 penetrating the cylindrical shell 1 . A catalyst is provided in the catalytic section 26 . When air enters the catalytic section 26 , the working fluid is oxidized by the catalyst.
[0033] The spoiler section 27 is provided with a water injection pipe 34 that passes through the cylindrical shell 1. A spoiler spring 28 is provided in the spoiler section 27. The spoiler spring 28 is spiral-shaped and can rotate, guide and stir the fluid flowing in the spoiler section 27, causing the liquid in the coil 2 to rotate and flow into the bottom chamber of the cylindrical shell 1 for stratification.
[0034] Working principle of the present invention:
[0035] During operation, the working fluid is injected from the top of the coil 2, hydrogen is blown in from the hydrogen feed port 31, nitrogen is blown in from the nitrogen inlet 32, and air is blown in from the air inlet 33. At the same time, water is injected from the water injection pipe 34, and the water valves of the water inlet 11 and the water outlet 12 are opened. Hot water with a temperature of 40 to 55°C is introduced into the water inlet 11. The hot water is in the chamber above the water baffle 3, which heats the working fluid in the coil 2 and maintains a constant reaction temperature. The hot water comes out through the water outlet 12. When the working fluid enters the front end of the coil 2, the air carried by the working fluid is discharged through the first exhaust pipe 21, and then enters the hydrogenation packing section 22 to react with the hydrogen. After entering the cavity section 23, the nitrogen backwashes the excess unreacted hydrogen in the hydrogenation packing section 22, intercepts the impurities in the gas through the interception net 241, and then enters the stubby interface 24, and then is discharged through the second exhaust pipe 25 The working fluid continues to pass through the cavity section 23, then enters the catalytic section 26, contacts with the air to be oxidized, and then enters the turbulence section 27, reacts with the water injected into the turbulence section 27, and then the working fluid is rotated and guided and stirred by the turbulence spring 28, causing the liquid in the coil 2 to rotate and flow into the bottom chamber of the water-blocking plate 3 for stratification. The packing layer 4 is filled with small hydrophobic particles, and the particles in the oil phase and the oil between the particles form an oil film connected together, making it difficult for hydrogen peroxide to pass through. When the hydrogen peroxide below the packing layer 4 becomes more and more, the water level rises, pushing the oil layer in the lower chamber to rise. After the filtering effect of the packing layer 4, the hydrogen peroxide is retained below and discharged from the L-shaped drain pipe 5 to obtain hydrogen peroxide of a certain concentration. The oil layer is also continuously discharged from the oil discharge port 6 above to separate the oil phase from the hydrogen peroxide.
[0036] The present invention is simple to operate, easy to use, and suitable for comprehensive promotion and application. Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. An integrated device for producing hydrogen peroxide by an anthraquinone method, comprising a cylindrical shell (1), characterized in that: A coil (2), a water baffle (3) and a packing layer (4) are arranged from top to bottom in the cylindrical shell (1). The coil (2) passes through the water baffle (3). The bottom end of the coil (2) passes through the packing layer (4). The top end of the coil (2) passes through the cylindrical shell (1). The coil (2) includes a hydrogenation packing section (22), a cavity section (23), a catalytic section (26) and a turbulent section (27) from top to bottom. A water outlet (12), a water inlet (11), an oil discharge port (6) and an L-shaped drain pipe (5) are arranged from top to bottom on the right side of the cylindrical shell (1). The water outlet height of the L-shaped drain pipe (5) is slightly lower than the height of the packing layer (4).
2. The integrated device for producing hydrogen peroxide by anthraquinone method according to claim 1, characterized in that: The hydrogenation packing section (22) is provided with a hydrogen feed port (31) penetrating the cylindrical shell (1).
3. The integrated device for producing hydrogen peroxide by anthraquinone method according to claim 2, characterized in that: A hydrogenation packing is provided in the hydrogenation packing section (22).
4. The integrated device for producing hydrogen peroxide by anthraquinone method according to claim 1, characterized in that: The cavity section (23) is provided with a nitrogen inlet (32) that passes through the cylindrical shell (1).
5. The integrated device for producing hydrogen peroxide by anthraquinone method according to claim 1, characterized in that: A first drain pipe (21) is provided at the front end of the coil (2).
6. The integrated device for producing hydrogen peroxide by anthraquinone method according to claim 1, characterized in that: A short and thick interface (24) is provided between the hydrogenation filler section (22) and the cavity section (23), an interception net (241) is provided in the short and thick interface (24), and a second drain pipe (25) is provided on the thick end interface (24).
7. The integrated device for producing hydrogen peroxide by anthraquinone method according to claim 1, characterized in that: The catalytic section (26) is provided with an air inlet (33) penetrating the cylindrical shell (1), and a catalyst is provided in the catalytic section (26).
8. The integrated device for producing hydrogen peroxide by anthraquinone method according to claim 1, characterized in that: A water injection pipe (34) penetrating the cylindrical shell (1) is provided on the flow-disturbing section (27), and a flow-disturbing spring (28) is provided inside the flow-disturbing section (27).